Casey, Illinois Climate
United States
Pop. 2,709 Elev. 199 m / 653 ft
TZ: America/Chicago (UTC-5) ·
Casey has warm summers with average highs of 88°F (31°C) in July, and frigid winters averaging 18°F (-8°C) in January. Humidity pushes the summer feels-like temperature to 103°F (39°C), while wind chill can drive winter lows to 11°F (-12°C). Rain falls on about 58 days per year (37.9 in / 961 mm total), with snow on 7 days and 29 in (738 mm) of annual accumulation. The city averages 129 sunny days per year and around 36 thunderstorm days.
| Temperature | 88°F (31°C) high | 18°F (-8°C) low |
| Feels like | 103°F (39°C) high | 11°F (-12°C) low |
| Rain | 58 days | 37.9 in (961 mm) /yr |
| Snow | 7 days | 29.1 in (738 mm) /yr |
| Sky | 129 sunny | 36 stormy |
| Wind | 2.4 mph (1.1 m/s) avg |
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Explore on the MapMonthly Climate Chart
Best months to visit: Mar, May, Aug, Sep, Oct
Sky & Air by Month
Cloud cover (%)
50
Jan 62
Feb 54
Mar 64
Apr 64
May 59
Jun 59
Jul 43
Aug 32
Sep 43
Oct 53
Nov 66
Dec Humidity (%)
70
Jan 67
Feb 56
Mar 62
Apr 64
May 69
Jun 76
Jul 69
Aug 62
Sep 66
Oct 69
Nov 76
Dec Weather Days by Month
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 53 mi University of Illinois Willard Airport (CMI)
Ski resort 172 mi
National park 41 mi Shakamak State Park
Mountain peak
(4,938 ft) 346 mi Gregory Bald
Hospital 20 mi Sarah Bush Lincoln Health Center
Hiking trail 41 mi Trail 1
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 33°F 1°C | 18°F -8°C | 0.9 in 22 mm | 10.9 in276 mm | 14 |
| February | 42°F 6°C | 26°F -3°C | 1.6 in 39 mm | 5.3 in133 mm | 9 |
| March | 63°F 17°C | 40°F 5°C | 4.0 in 101 mm | 0.8 in20 mm | 11 |
| April | 68°F 20°C | 48°F 9°C | 6.3 in 161 mm | — | 5 |
| May | 73°F 23°C | 56°F 13°C | 4.1 in 104 mm | — | 6 |
| June | 84°F 29°C | 69°F 21°C | 5.3 in 134 mm | — | 8 |
| July | 88°F 31°C | 73°F 23°C | 6.2 in 158 mm | — | 9 |
| August | 83°F 29°C | 65°F 18°C | 0.9 in 22 mm | — | 16 |
| September | 82°F 28°C | 58°F 14°C | 2.1 in 53 mm | — | 18 |
| October | 70°F 21°C | 50°F 10°C | 2.8 in 70 mm | — | 18 |
| November | 54°F 12°C | 38°F 3°C | 2.8 in 71 mm | 4.7 in119 mm | 10 |
| December | 42°F 6°C | 27°F -3°C | 1.0 in 25 mm | 7.4 in189 mm | 5 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 14 | 0 |
| February | 9 | 2 |
| March | 11 | 4 |
| April | 5 | 5 |
| May | 6 | 4 |
| June | 8 | 6 |
| July | 9 | 7 |
| August | 16 | 2 |
| September | 18 | 2 |
| October | 18 | 2 |
| November | 10 | 2 |
| December | 5 | 0 |